Improved watchmakers  tool



Mat fia.

c.. E; MURRAY, or LocK HAV-EN, PENNSYLVANIA. I Letter-Patent No. 87,868, Ma/rch 16, 1869; antedated .Ma/rch12, 1869.

IMPROVED WATCHMAKERS' TOOL.

Th. Bohndnle referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that I, O. E. MURRAY, of Lock Haven, in the county of Clinton, andl State of Pennsylvania, have invented a new and useful Improvement in Watchmakers Tools; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The present invention relates to a tool more especially intended for watchmakers, although it can be adapted to other uses, and is intended forstraightening the pivots to the wheels of a watch-movement, for trimmin oii',to finish the ends or heads to the pivots, and for nishing the wheels.

Inthe accompanying plate of drawings my improved tool is illustrated- Figure 1 being 'a`side elevation, or view of the same. Figures 2 and 3, face views of the heads orpuppets 'to the .tooL

A, in the drawings, represents a bar, of metal, wood, or other suitable material, to which bar, at one end, is xed a block oi' post, B, and at the other provided with a block or post, O, arranged loosely thereon, so as to slide and to be moved forward and backward, toward or away from the fixed post, and secured at any desired paint bymeans of a set-screw, D, or othersuitable de vice or devices.

The post B has fixed to it a circular disk-shaped jaw, E, above which is another similar but smaller'4 jaw, F, xed to one endof a rod, G, that ishung upon a fulcrum at H, so as to be swung up'or down, by means of and through a setor thumb-screw, I, in its rear end, J, acting upon the top of the said block B.

The central portion of the post B is cut out, and in it is inserted a block, K, and there hung, so as to be swung np or down, being secured and fixed in position by a set-screw, L, of the post.

M, a spindle passing through the swinging block K- This spindle M, a't one end, is provided with a head, N, and at the other, upon the face of the jaw E, is secured the wheel to be trimmed or trued oil' on its rim. The adjustable post (l carries jaw-wheels Q and P, similarly arranged tothose of the post B.

R, a screw-rod, screwingpthrough posti), and larger circular jaw Q of the.same,.and provided at one end with a head, S, suitable for pressing the same in or out.

This screw is arranged to act upon the square shoulder,

`or arm T, of the rod U, passing through the centre of -tlle said jaw Q, andthus, when the post O shall have been moved suiiiciently near the fixed post B, to bring said shoulder 'l in contact with the rim vof the wheel fixed or secured on the inner and opposite end of the spindle M, by turning the crank, or head, on the outer end of the said spindle M, it will be indicated whether the wheel is true on its rim, by said rim remaining lin or removing from contact with the shonlder'l during its revolution.

'In order to straighten the pivots of a Wheel, it is placed between thetwo posts B C, with its facesparallel to the face of the jaw E, and-the pivots insertedl between the jaws Q and P and E and F, respectively. By operating the screws in the rear, or outer ends of the horizontal bars, carrying at their opposite ends the A smallerjaws P F, said jaws are lowered till they come in contact with the pivots, and the pressure thus brought to bear is increased by continuing to operate the screws till the desired result is obtained.

It will be perceived, from the above, that to trim or nish a pivot-head, it is only necessary to make use of one set of jaws, as said head may be filed or otherwise operated upon, as required, -while that on the opposite side of the wheel, or its opposite end, as the case may be, is firmly griped, or held between thejaws.

Having thus described my invention,

I claim as new, and desire to secure by'Letters Patenty The arrangement, herein described, of theseveral parts of a compound tool for holding watch-wheels while their faces are being trued, or their pivots trimmed or finished, all constructed, combined, and

operated as described.

(l. E. MURRAY.

Witnesses JAS. F. BERRY, I. L. EcKEI'.. 

